SI1141 View Datasheet(PDF) - Silicon Laboratories

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SI1141

PROXIMITY/AMBIENT LIGHT SENSOR IC WITH I2C INTERFACE

Silicon Laboratories 

Si1141/42/43

1. Electrical Specifications

1.1. Performance Tables

Table 1. Recommended Operating Conditions

Parameter

VDD Supply Voltage

VDD OFF Supply Voltage

VDD Supply Ripple Voltage

Symbol

VDD

VDD_OFF

Condition

OFF mode

VDD = 3.3 V

1 kHz–10 MHz

Min

Typ Max Unit

1.71

—

3.6

V

–0.3

1.0

V

—

—

50

mVpp

Operating Temperature

SCL, SDA, Input High Logic

Voltage

SCL, SDA Input Low Logic

Voltage

PS Operation under

Direct Sunlight

IrLED Emission Wavelength

T

I2CVIH

I2CVIL

Edc

l

–40

25

85

°C

VDDx0.7 —

VDD

V

0

— VDDx0.3 V

—

—

128

klx

750

850

950

nm

IrLED Supply Voltage

IrLED Supply Ripple Voltage

VLED IrLED VF = 1.0 V nominal VDD

Applies if IrLEDs use

separate supply rail

0–30 kHz

—

30 kHz–100 MHz

—

—

4.3

V

—

250 mVpp

—

100 mVpp

Start-Up Time

LED3 Voltage

VDD above 1.71 V

25

—

—

ms

Start-up

VDDx0.77 —

—

V

Table 2. Performance Characteristics1

Parameter

Symbol

Condition

Min Typ

Max

Unit

IDD OFF Mode

Ioff VDD < VDD_OFF (leakage from SCL, —

240

1000

nA

SDA, and INT not included)

IDD Standby Mode

Isb

No ALS / PS Conversions

— 150

500

nA

No I2C Activity

VDD = 1.8 V

Notes:

1. Unless specifically stated in "Conditions", electrical data assumes ambient light levels < 1 klx.

2. Proximity-detection performance may be degraded, especially when there is high optical crosstalk, if the LED supply

and voltage drop allow the driver to saturate and current regulation is lost.

3. Guaranteed by design and characterization.

4. Represents the time during which the device is drawing a current equal to Iactive for power estimation purposes.

Assumes default settings.

4

Rev. 1.4

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